Muscles of the Pectoral Region

Question 1

attachments of Pectoralis Major

Answer 1

medial: medial half of clavicle, sternum, costal cartliges 1-7

lateral: lateral lip of intertubercular sulcus

Question 2

torque of Pectoralis Major

Answer 2

medially rotates, flexes, and adducts the humerus

Question 3

innervations of the Pectoralis Major

Answer 3

Lateral and Medial Pectoral Nerve

Question 4

attachments of Pectoralis Minor

Answer 4

medial: ribs 3-5

lateral: coracoid process of scapula

Question 5

torque of Pectoralis Minor

Answer 5

stabalizes pec during “long reach”
anteriorly tilts and depresses the scapula

Question 6

innervation of Pectoralis Minor

Answer 6

medial pectoral nerve & pectoral brand of thoracoacromial artery

Question 7

attachments of Subclavius

Answer 7

medial: Rib 1

lateral: clavicle

Question 8

torque of Subclavius

Answer 8

stabilize and depress clavicle
stabilize SC joint

Question 9

innervation of Subclavius

Answer 9

nerve to subclavius

Question 10

attachments to Serratus Anterior

Answer 10

medial: Rib 1-8

lateral: medial boarder and inferior angle of scapula

Question 11

torque of Serratus Anterior

Answer 11

protracts scapula
upward rotation
stabilize scapula on posterior thoracic wall